CN103157864B - Aluminium alloy water, gas separating device vacuum brazing technique - Google Patents

Abstract

The invention discloses a kind of aluminium alloy water, gas separating device vacuum brazing technique, belong to vacuum brazing technique.Its scheme is: put the workpiece in vacuum drying oven, is heated to 300-400 DEG C in 20-25min, is incubated 60-80min, controls vacuum ＞ 8 × 10^-3Pa；In 15-20min, it is warming up to 560-570 DEG C, is incubated 20-40min, control vacuum ＞ 4 × 10^-3Pa；In 10-15min, it is warming up to 600-605 DEG C, is incubated 10-20min, control vacuum ＞ 3 × 10^-3Pa；Being cooled to 595-598 DEG C in 10-15min, be incubated 10-15min, power-off is lowered the temperature.Present invention reduces the soldering processes time, improve efficiency, eliminate fin and be easily deformed, weld seam easy corrosion burning, plumpness difference etc. defect；It it is a kind of method of welding aluminum alloy moisture separator.

Description

Aluminium alloy water, gas separating device vacuum brazing technique

Technical field: the present invention relates to a kind of Aluminum Alloy Vacuum Brazing technique, particularly relates to a kind of aluminum and closes Jinsui River gas separating device vacuum brazing technique.

Background technology: moisture separator be the compressed air in air compressor machine is carried out water, edema caused by disorder of QI from one Individual vitals.Moisture separator has that volume is little, structure is complicated, solder side distribution is wide, size essence Degree requires the features such as high, difficulty of processing is big, has been used up Nocolok soldering processes and produces.This technique Method is for there being brazing flux soldering, and its shortcoming is to increase spraying brazing flux and after welding treatment operation, and the feature of environmental protection is poor, Brazing quality is unstable.Although vacuum brazing technique method is in aluminium alloy plate fin radiator system in recent years Gradually be widely applied in making, but product structure mostly to be plane, bead direction single；And aluminum Alloy moisture separator constructed of aluminium is complicated, and Product jointing face is many, distribution is wide, there is multi-direction weld part Position, in Process of Vacuum Brazing, fin is easily deformed, and is therefore difficult to produce satisfactory aqueous vapor and separates Device product.

Summary of the invention: for drawbacks described above present in prior art, it is desirable to provide a kind of logical Cross change welding condition true to increase substantially the aluminium alloy water of product brazing quality, gas separating device Empty soldering processes.

To achieve these goals, the present invention is by the following technical solutions: it includes vacuum brazing；Tool Body technology parameter is as follows:

1) put the workpiece in vacuum drying oven, in 20-25min, vacuum drying oven be heated to 300-400 DEG C, Insulation 60-80min, controls vacuum ＞ 8 × 10^-3Pa；

2) in 15-20min, vacuum drying oven is warming up to 560-570 DEG C, is incubated 20-40min, control Vacuum ＞ 4 × 10^-3Pa；

3) in 10-15min, vacuum drying oven is warming up to 600-605 DEG C, is incubated 10-20min, control Vacuum ＞ 3 × 10^-3Pa；

4) in 10-15min, vacuum drying oven is cooled to 595-598 DEG C, is incubated 10-15min, then Power-off；Until workpiece temperature is down to 590 DEG C.

Compared with the prior art, due to the fact that and have employed technique scheme, in conventional vacuum soldering The baking operation of 180-200 DEG C and the bringing-up section operation of 480-530 DEG C is eliminated on the basis of technique, because of This not only shortens the time of whole brazing process, improves efficiency, and also overcomes fin Be easily deformed under conventional vacuum soldering processes temperature retention time, weld seam usually occur corrosion burn-off phenomenon, It is difficult to reach the defect of full requirement；It addition, the temperature retention time of 600-605 DEG C of section shortens to 10-20min, had both decreased the weld interval of high temperature section, had further improve welding efficiency.Use Present invention process can obtain that outward appearance is qualified, weld seam microstructure and the good product of weldquality.

From the point of view of situation about applying with practical conditions, the aluminium alloy aqueous vapor using present invention process to produce separates Device, the ratio of brazing area of its weld seam is significantly improved.The following is the aluminum using present invention process to produce The test data that alloy moisture separator (four batches, totally 166 set) is carried out under table 1 experimental condition.

Table 1: experimental condition

Temperature	Heating-up time (min)	Temperature retention time (min)	Vacuum (Pa)
				300-400℃	20	60-80	(9-8)×10-3
560-570℃	15	10-20	(4-5)×10-3
				600-605℃	15	10-20	(5-3)×10-3
595-598℃	10min (lowers the temperature)	10-15	3×10-3

Table 2: product leakage is tested

Batch	Product quantity (overlaps)	Pricker passing number	Number of non-compliances	Pricker qualification rate %
					1	30	28	2	93
2	50	45	5	90
					3	20	19	1	95
4	66	60	6	91

Knowable to above-mentioned result of the test, present invention process is before fully meeting product property indices Put, by product pricker qualification rate brought up to more than 90%.

Accompanying drawing illustrates:

Fig. 1 is the temperature profile of the present invention.

Detailed description of the invention: with specific embodiment, the present invention is made furtherly below in conjunction with the accompanying drawings Bright:

Part is cleaned up according to a conventional method, cleaned part is put into the drying room of constant temperature and humidity Being shaped assembling, correction, technological parameter the most as shown in Figure 1 carries out vacuum brazing:

1) workpiece setting is put in vacuum drying oven, in 20-25min, vacuum drying oven is heated to 300-400 DEG C, it is incubated 60-80min, controls vacuum ＞ 8 × 10^-3Pa；

2) in 15-20min, vacuum drying oven is warming up to 560-570 DEG C, is incubated 20-40min, control Vacuum ＞ 4 × 10^-3Pa；

3) in 10-15min, vacuum drying oven is warming up to 600-605 DEG C, is incubated 10-20min, control Vacuum ＞ 3 × 10^-3Pa；

4) in 10-15min, vacuum drying oven is cooled to 595-598 DEG C, is incubated 10-15min；Then Power-off, until workpiece temperature is down to 590 DEG C, can come out of the stove.

In the above-described embodiments, by workpiece by the purpose that setting mode is sent in stove be make brazing filler metal melts after Strengthen solder fluidity in gravity impact, thus ensure that solder spreads into each weld, and favorably Overflow in unnecessary solder, it is ensured that weldment presentation quality.

Claims (1)

1. aluminium alloy water, a gas separating device vacuum brazing technique, including vacuum brazing；Its feature exists As follows in concrete technology parameter:

1) workpiece setting is put in vacuum drying oven, in 20-25min, vacuum drying oven is heated to 300-400 DEG C, it is incubated 60-80min, controls vacuum ＞ 8 × 10^-3Pa；

2) in 15-20min, vacuum drying oven is warming up to 560-570 DEG C, is incubated 20-40min, control Vacuum ＞ 4 × 10^-3Pa；

3) in 10-15min, vacuum drying oven is warming up to 600-605 DEG C, is incubated 10-20min, control Vacuum ＞ 3 × 10^-3Pa；

4) in 10-15min, vacuum drying oven is cooled to 595-598 DEG C, is incubated 10-15min, then Power-off；Until workpiece temperature is down to 590 DEG C.